What you can do with the Struts2 interceptor definition of the package is not also to define the interceptor in other packages

The wolf's definition interceptor intercepts non-logged user operations, but my action is in a different package, is my interceptor required to be defined in each package? Can you define a common one?

This is a must.

<package name= "Default" extends= "Struts-default"  namespace= "/" >   <interceptors> < Interceptor Name= "Custom" class= "Myintercepter" ></interceptor>   </interceptors></package >

This defines an interceptor in a package called "Default", in other packages, as long as the package is inherited:

<package name= "Package1" extends= "Default"  namespace= "/" >......</package><package name= " Package2 "extends=" Default "  namespace="/">......</package>

So the little wolf can use the interceptor in the other bag.

What you can do with the Struts2 interceptor definition of the package is not also to define the interceptor in other packages